patch 8.1.1257: MSVC: name of object directory now always right

Problem:    MSVC: name of object directory now always right.
Solution:   Adjust comment.  Don't use different directory for DIRECTX.  Do
            use different directory for USE_MSVCRT. (Ken Takata, closes #4333)

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1257,
 /**/
     1256,
 /**/